2 4*x 2*x*atan(4*x) + --------- 2 1 + 16*x
/ 3 \ | 64*x 8*x | 2*|- ------------ + --------- + atan(4*x)| | 2 2 | | / 2\ 1 + 16*x | \ \1 + 16*x / /
/ / 2 \\ | 2 | 64*x || | 16*x *|-1 + ---------|| | 2 | 2|| | 96*x \ 1 + 16*x /| 8*|3 - --------- + ----------------------| | 2 2 | \ 1 + 16*x 1 + 16*x / ------------------------------------------ 2 1 + 16*x